Cornice-brake machine.



H. G. DREISVOGT.

CORNICE BRAKE MACHINE. APPLICATION FILED SEPT. 30, 1910.. 1,057,167, Patented July 8, 1913.

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H. C. DREISVOGT.

CORNICE BRAKE MAGHNE.

APPLICATION FILED SEPT. so, 1910.

Patented July 8,1913.

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CORNICE-BRAKE ll/LilCl-EJNIIi Specification of Letters Patent.

Patented July 8, 1918.

Application filed September 30, 1910. Serial No. 584,701.

To all eli/0m t may concern Be it known that I, HERMAN C. Dimisvoc'r, a citizen of the United States, residing in Santa Clara county and State of Cali fornia, have invented a new and useful lmprovement in Cornice-Brake Machines, of which the following is a specification.

My invention relates to that class of inachines which are used for bending` sheet metal.

The object of my invention is to provide a combined hand and power brake, whereby a far greater range of metal in regard to length and thickness can be more cheaply bent than is possible with the brake machines heretofore constructed.

The manner in which l accomplish my object is set forth in detail in the following specification and illustrated in the aecompanying drawings in whichlligure 1 is a vertical end elevation. Fig. 2 is a rear elevation. Figs. 3 and 4 are details of the apron.

In the. drawings 8 indicates the feet of the frame and 4t the legs. Fixed to the legs at each end is an end plate Fixed on these end plates is a horizont-al table plate (i.

Fixed to the front vertical parts of the end plates 5 is a plate 6a forming with the parts 3, 4c, 5 and 6 the main frame of the machine. Fixed on the top portion of this plate Gt, are hinge brackets indicated by the dotted circle and bolt head in Fig. 1; pivoted in these brackets are hinge pieces 7. Fixed to these hinge pieces is an apron S indicated by the dotted lines in Fig. 1. Adjustably secured to the rear part of each of the end plates 5 is a hinge bracket 9. These brackets have elongated apertures 10 which permit a horizontal adjustment on the bolts 11. The adjustment of these parts is determined and fixed by the screws 12 and 13 which extend through lugs 14 forming part of the end plates 5. The screws 12 enter threaded holes in the brackets 9 and are thereby adapted to draw the hinge brackets toward the lugs 14, while the screws 1S have a threaded connection through the lugs and their ends butt against the brackets and press them in the opposite direction to the draw of the screws 12 thereby locking those parts in the desired position. Fivoted to the brackets 9 by the pivot pins 15 are top end plates 1G. Secured in these end plates is a top plate 17 and a front plate 1S. The angle joint of these two plates are joined by an angle bar 19. Extending through the ends 5 beneath the table is a shaft 29. On this shaft gears 21 and 22 are secured. These gears have eccentric journals on the inner sides indicated by the dotted circle 23 shown in Fig. 1. .Extending through the end plates 16 and rotatable in suitable bearings thereon is a shaft 24 parallel with the shaft 20. Fixed on each end of this shaft 24 is a ratchet wheel 25 in vertical line with the gears 21. On the inside of these ratchetwheels and forming a part thereof are projecting journals indicated by the dotted cir cle 26, Fig. 1. Supported on t-he eccentric journals 23 and 26 at each end of the machine are two connecting links 27. These links are moved vertically by the rotary motion of the shaft 20, gears 21, and eccentric journals 2B, whereby the parts 16, 17 and 18 forming the pivoted head of the machine are moved vertically, and the aws hereafter described are opened and closed. The rotary movement of the ratchets 25 and eccentric journals 26 in the links 27 adjusts the vertical relation of the head and body of the machine, and determines the width of the space between the jaws. `lnsertible in each link 27 is a pin 28, the head of which is adapted to tit between the teeth of the ratchet wheel 25, these pins are removable to permit the adjustment of the links 27 before described, and their insertion locks the ratchet wheels in the position desired. Supported on each of the end plates 5 in the bearings 29 is a transverse horizontal shaft 29a. Fixed on each of these shafts is a worm gear 30 adapted to mesh with the gears 21 and 22. On one end of each of these shafts 29a is a gear 30a. These gears are attached to the shafts 29a by a removable key 81. On the opposite end of the shafts are handles 32. Supported in the bearings 33 is a shaft 34 on which there is a fixed pulley 35 and two loose pulleys 36. Fixed on this shaft in mesh with the gears 30 are gears 37. Extending through the end plates and supported therein and by the cylindrical bearings 48 hereinafter described is a shaft 39. On this shaft are tight and loose pulleys 40, a clutch ll and a gear 4t2. This gear is in mesh with a gear 43 fixed on the shaft 414. This shaft 414 is supported in the end plates 5 and in the brackets 45 secured to the underside of the table plate G. ln the center of this shaft is a gear t6 which meshes with a gear 47 journaled on the cylindrical bearing 4S which is firmly clamped in the boxes 49 of the bearing brackets 50. Forming part of the gear 47 is a radial arm 51. Pivoted to the end of this arm is a connecting rod 52. This rod is pivotally connected with the hinged apron S b y the hinge piece On the opposite side of this plate a wheel bracket 54 is secured in which a grooved wheel 55 is free to rotate. Adjustably secured at one end to the inside of the vertical front plate 6a by the screws 56 and 57 is a circular track 58. This track is pivotally connected at the other end to a link 59. This link is pivoted to a link piece 60 which is secured to the front top plate 18 by the screw 61. Secured to each of the hinge pieces 7 is a hand lever 62 by which the member 8 can be operated when disconnected from the connecting rod 52. Another lever 62a pivotally supported by plate 6a is adapted to operate the clutch 'member 41 as shown in Fig. 2.

Secured to the plates 6 and 17 are clamping aws 63, and to the hinged apron S, an angle bar 64 is secured. Pivotally secured to the lugs on the inside of the apron 8 is a swinging plate 66 shown in end elevation in Fig. 3 and in longitudinal elevation in Fig. 4. In Figs. 3 and 4 the solid lines show the apron and swinging plate in a pendant position and parallel with each other. In this position the operative parts of the machine are at rest. In Fig. 3 the dotted lines indicate the apron in a horizontal and the swinging plate in a vertical position. The rotatable engagement of the wheel with the track 58 is adapted to prevent any radial movement of the apron 8 under the pressure resulting from bending heavy metal, and the swinging plate 66 is adapted to prevent any sagging in the center of the plate 8 under the same pressure.

Vhen my device is connected together as described and provided with power through belt transmission to the driving pulleys 36 and 40 its operation is as follows: The several parts being in the positions shown by the solid lines and thel jaws 63 open for insertion of the plates of metal to be bent, the shafts 29t1 are rotated either by the handles 32 or by shifting one of the driving belts onto the pulleys 35. The rotation of these shafts by either of these means rotates the gears 21 and 22. The eccentric bearings thereon operating upon the links 27 dra-w down the upper jaw support pivcted on the p-ins 15 until the required pressure has been attained upon the metal between the jaws. The power is then shut ofi' and movement of the shaft 2O stopped. The adjustment of the jaws to the thickness of the metal is made by the removal of the pins 2S and rotation of the ratchet wheels 25 on the shaft 24 whereby the eccentric bearing 26 length- ,ens or shortens the distance between the centers of the shafts 20 and 24 connected by the links 27. The sheet metal being thus secured between the jaws, the clutch lever 621 is raised and th-e clutch 41 Vthereby engaged with the gear 42 on the shaft 39. The driving belt on the pulleys 40 is then shifted from the loose to the tight pulley whereby the gear 43 and the shaft 44 rotates the gears 46 and 47. The arm 51 of the gear 47 through the connecting rod 52 forces the apron 8 to the height desired. In this movement the radial displacement of the apron 8 and sagging of its center is prevented by the track 58 and plate 66 as already described. IVhen the highest desired point is reached in the upward bending movement, the downward movement of the lever 62 releases the clutch, and allows the parts 7 -S- 52 and members connected therewith to re turn by gravity to their normal position of rest. A reverse movement of the shafts 29a releases the metal by raising the upper aw supporting part of the machinery. The adjustment and removal of the track can be effected by the adjustment of the screws 56, 57 and 61 and disconnection of the link 59. By the removal of the keys 31, from the gear wheels 30, the machine can be operated by hand, the crank 32 being turned tol close the jaws 63 and the lever 62 being used to operate the apron 8. Y

IVhat I claim as new and desire to secure by Letters Patent is 1. In a machine of the kind described, having a supporting body, a movable portion pivotally supported thereon, and an apron hinged to said supporting body, the combination with said supporting body and movable portion, of an arcuate metal track adjustably secured to said body and said portion, and a wheel rotatably secured on said apron adapted to run on the inside of said track when said apron is raised as and for the purposes described.

2. In a machine of the kind described, having a hinged apron, the combination with an arcuate track adjustably secured to the main parts of said machine, of means attached to said apron adapted to constitute a movable bearing between said apron and track, as and for the purposes described.

3. In a machine of the kind described, the combination with an arcuate track secured to the main parts thereof, and an apron hinged to said main parts having a swinging plate, the free end of Said apron being movably engaged with the inside of said track, of means adapted to raise said apron, as and for the purposes described.

4. In a machine of the kind described, the combination with the main frame, an arcuate track secured thereto, an apron having a movable bearing engagement with the inside of said track, of means adapted to operate said apron, consisting of a connecting rod pivot-ally secured to a hinge piece bolted to said apron, a gear having' a radial arm pivotally secured to said connectingY rod, and means for opel-ating' said gear, rod and apron as described.

5. In a machine of the kind described, the combination consisting' of a supporting' and movable body, a clamping mechanism by which the relative positions of said body parts are adjusted, means adapted to operate said clampingJ mechanism, a circular track adjustably secured to said body parts, an apron hinged to said supporting' body, and having a swinging' plate, bearing' means secured on said apron in movable engagement with the inside of said track, and means supported on said body adapted to operate said apron as and foi' the purposes described.

HERMAN C. DREISVOGT. Vitnesses THOMAS J. MORGAN, JULIUS RUBiNsTnIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

